Access Denied DHCP Tool

I cannot figure out why this is happening, when opening the DHCP tool on my server, I get the following message.

Access Is Denied
You do not have access to this DHCP server. To view information on a DHCP server, you must be logged in as an Administrator, DHCP Administrator, or DHCP User.

If you still cannot access the server, to retry the connection, either press F5 or on the Action menu, click Refresh.

I’ve verified that I’m both a Domain Admin and a member of the DHCP Administrars group, and it does this regardless of what account is used to login. This works fine if I log into a different DHCP server on our network. It’s only this server that it does not work on.

Some other relevant details:

• Windows Server 2003 R2 Standard Edition
• Server Roles
  • File Server
  • Application Server (IIS)
  • Domain Controller (Active Directory)
  • DNS Server
  • DHCP Server
• Additional Software
  • Symantec Endpoint Protection (v12.1.1000.157 RU1)
  • Altiris (v7.1)